Stellar Objects. Sophia Williams & Amtur Ruqiya 6 th P eriod Science. RED SUPERGAINTS.
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A STAR OF 15 SOLAR MASSES EXHAUSTS ITS HYDROGEN IN ABOUT ONE THOUSAND THE LIFE TIME OF OUR SUN. THESE STAR IS KNOWN AS RED SUPER GAINTS.BETELGEUSE IS KNOWN AS RED SUPER GAINTS. RED SUPER GAINTS ARE SIMILAR TO RED GAINTS. FORUMS WHEN THIS RUNS OUT OF HYDROGEN IT REACHES TRIPLE ALPHA PROCESS OF NUCLEAR FUSSION, IT CONTINUES TO BURN FOR A TIME AND EXPANDS TO BURN FOR A TIME AND EXPANDS TO AN EVEN LARGER VOLUME.THEN IT BLOWS OUT . THEN THERE IS THE FORMATION OF NEW STARS. AND THEY LAST FOR ONLY FEW HUNDRED THOUSAND YEARS MAYBE UP TO MILLION.
A NEUTRON STAR IS MADE ENTIRELY OUT OF NEUTRON.THERE ARE THREE MAIN LAYERS IN NEUTRON STAR . THEY ARE SOLID CORE , A LIQUID MANTLE ,AND A THIN SOLID CRUST. THEY ARE HYPER DENSE FORM OF DEAD STAR COMPOSED ENTIERLY OF NEUTRON.NEUTRON HAS A VERY INTENSE MAGNETIC FIELD. AS THE MAGNETIC FIELD GETS COMPRESSEDTHE STAR SHRINKS AND THE FIELD DENSITY GOES WAY UPAND THEN IT GOES AWAY.
NUCLEAR REACTION OF NEUTRON STAR
Main Sequence Star: The Sun
The Sun was formed about 4.57 billion years ago when a hydrogen molecular cloud collapsed. The Sun is about halfway through its main sequence evolution, during which nuclear fusion reactions in its core fuse hydrogen into helium. Each second, more than four million metric tons of matter are converted into energy within the Sun's core, producing neutrons and solar radiation. At this rate, the Sun has so far converted around 100 Earth-masses of matter into energy. The Sun will spend a total of approximately 10 billion years as a main sequence star. The Sun does not have enough mass to explode as a supernova. Instead, in about 5 billion years, it will enter a red giant phase, its outer layers expanding as the hydrogen fuel in the core is consumed and the core contracts and heats up.Helium fusion will begin when the core temperature reaches around 100 million Kelvin's and will produce carbon, entering the asymptotic giant branch phase.